Atom-by-Atom Construction of a New Qubit Platform
Researchers made a groundbreaking electron-spin qubit platform assembled atom-by-atom. This enables the simultaneous handle of many qubits, a considerable step from the earlier capacity of taking care of only a single qubit. The system offers atomic-scale precision and distinguishes alone from other qubit platforms in conditions of versatility and configuration.
Experts at the IBS Heart for Quantum Nanoscience (QNS) at Ewha Womans University have completed a groundbreaking move ahead in quantum information and facts science. In partnership with teams from Japan, Spain, and the US, they created a novel electron-spin qubit system, assembled Multi-Qubit Manage
Compared with former atomic quantum equipment on surfaces the place only a one qubit could be controlled, the researchers at QNS properly demonstrated the ability to management multiple qubits at the same time, enabling the software of single-, two-, and 3-qubit gates.
Qubits, the elementary models of quantum information and facts, are essential to quantum applications such as 
The STM tip (Fe) operates the sensor qubit and romote qubits which creates the new multiple qubit platform. Credit: Institute for Simple Science
Progressive Qubit System
Led by Yujeong Bae, Soo-hyon Phark, and director Andreas Heinrich, QNS made this novel platform, which consists of individual magnetic atoms put on a pristine area of a thin insulator. These atoms can be precisely positioned making use of the suggestion of a scanning tunneling microscope (STM) and manipulated with the help of electron spin resonance (ESR-STM). This atomic-scale command has permitted scientists to manipulate quantum states coherently. They also proven the likelihood of managing remote qubits, opening the route to scaling up to tens or hundreds of qubits in a defect-free of charge setting.
Yujeong Bae pointed out, “It is certainly awesome that we can now handle the quantum states of various specific atoms on surfaces at the exact same time.” The atomic-scale precision of this system enables for the remote manipulation of the atoms to perform qubit operations separately, with out relocating the idea of the STM.
Current qubit platforms. Credit score: Institute for Simple Science
Comparison with Other Platforms
This analysis marks a considerable departure from other qubit platforms, this kind of as photonic products, ion and atom traps, and superconducting products. One of the one of a kind rewards of this area-dependent electron-spin solution is the myriad of available spin Upcoming Potential clients
Looking ahead, the researchers anticipate quantum sensing, computation, and simulation protocols employing these exactly assembled atomic architectures. Completely, the operate by the QNS scientists is predicted to usher in a new period of atomic-scale regulate in quantum information and facts science, cementing Korea’s position as a worldwide chief in the field.
Reference: “An atomic-scale multi-qubit platform” by Yu Wang, Yi Chen, Hong T. Bui, Christoph Wolf, Masahiro Haze, Cristina Mier, Jinkyung Kim, Deung-Jang Choi, Christopher P. Lutz, Yujeong Bae, Soo-hyon Phark and Andreas J. Heinrich, 5 October 2023, Science.
DOI: 10.1126/science.ade5050
